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Schedule II - Condensed Financial Information of Registrant (Parent Only) - Statements of Financial Position - Parenthetical (Details) - $ / shares | Dec. 31, 2024 | Dec. 31, 2023
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Condensed Financial Statements, Captions [Line Items] |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common stock, authorized (in shares) | 2,500,000,000 | 2,500,000,000
Common stock, issued (in shares) | 494,734,908 | 492,279,405
Common stock, outstanding (in shares) | 226,225,161 | 236,438,294
Treasury stock (in shares) | 268,509,747 | 255,841,111
Principal Financial Group, Inc. Parent Only | Legal Entities |  |
Condensed Financial Statements, Captions [Line Items] |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common stock, authorized (in shares) | 2,500,000,000 | 2,500,000,000
Common stock, issued (in shares) | 494,734,908 | 492,279,405
Common stock, outstanding (in shares) | 226,225,161 | 236,438,294
Treasury stock (in shares) | 268,509,747 | 255,841,111

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